Hello Ilse,
Your history/dataset issue was linked to a display problem that has
now
been resolved on the public Main Galaxy server. We found that this UI
behavior was often linked to the use of Internet Explorer as a
browser.
For the best UI functionality when using Galaxy, we recommend using
Firefox, Chrome, or Safari.
Thank you for reporting the problem,
Jen
Galaxy team
--
Jennifer Jackson
http://galaxyproject.org